The district council, F1in fixing the charges to be paid under this Schedule, shall secure that the charges so payable are such as are sufficient, taking one financial year with another, to cover the cost of removing, storing and disposing of F2shopping or luggage trolleys under this Schedule.

The council may agree with persons who own shopping or luggage trolleys and make them available for use in its district a scheme for the collection by them of trolleys they make available for use; and where such an agreement is in force with any person, no charge may be demanded under paragraph 3 F3or 3Aby the council in respect of any trolley within the scheme in relation to which the provisions of the scheme are complied with.